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Soft-Output Successive Cancellation Stack Polar Decoder

Soft-Output Successive Cancellation Stack Polar Decoder
Soft-Output Successive Cancellation Stack Polar Decoder
Polar coding has been ratified for employment inthe 3GPP New Radio standard and several soft-decision decodersachieved comparable performance to that of the state-of-the-artsuccessive cancellation list decoder. Aiming for further improvingthe performance of the soft-decision polar decoders, we proposea soft-output successive cancellation stack (SSCS) polar decoder,which jointly exploits the benefits of the depth-first search ofthe stack decoder and the soft information output of the beliefpropagation decoder. This has the substantial benefit of facilitatingsoft-input soft-output (SISO) decoding and seamless iterativeinformation exchange in turbo-style receivers. As a further contribution,we intrinsically amalgamate our SSCS decoder into polarcodedlarge-scale multiple-input multiple-output (MIMO) systemsand conceive an iterative turbo receiver, operating on the basis oflogarithmic likelihood ratios (LLRs). Our simulation results showthat the proposed SSCS decoder is capable of outperforming thestate-of-the-art SISO polar decoders, despite requiring a lowercomplexity at moderate to high signal-to-noise ratios (SNRs).Additionally, compared with the non-iterative hard-output SCSdecoder, our SSCS scheme attained 1.5 dB SNR gain at a biterror ratio level of 10^-5, when decoding the [256; 512] polar codeof a (64 * 64) MIMO system.
0018-9545
Xiang, Luping
56d951c0-455e-4a67-b167-f6c8233343b1
Liu, Yusha
711a72e8-e8be-4be4-a79d-ea1413e7012a
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Xiang, Luping
56d951c0-455e-4a67-b167-f6c8233343b1
Liu, Yusha
711a72e8-e8be-4be4-a79d-ea1413e7012a
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Xiang, Luping, Liu, Yusha, Maunder, Robert, Yang, Lie-Liang and Hanzo, Lajos (2021) Soft-Output Successive Cancellation Stack Polar Decoder. IEEE Transactions on Vehicular Technology. (In Press)

Record type: Article

Abstract

Polar coding has been ratified for employment inthe 3GPP New Radio standard and several soft-decision decodersachieved comparable performance to that of the state-of-the-artsuccessive cancellation list decoder. Aiming for further improvingthe performance of the soft-decision polar decoders, we proposea soft-output successive cancellation stack (SSCS) polar decoder,which jointly exploits the benefits of the depth-first search ofthe stack decoder and the soft information output of the beliefpropagation decoder. This has the substantial benefit of facilitatingsoft-input soft-output (SISO) decoding and seamless iterativeinformation exchange in turbo-style receivers. As a further contribution,we intrinsically amalgamate our SSCS decoder into polarcodedlarge-scale multiple-input multiple-output (MIMO) systemsand conceive an iterative turbo receiver, operating on the basis oflogarithmic likelihood ratios (LLRs). Our simulation results showthat the proposed SSCS decoder is capable of outperforming thestate-of-the-art SISO polar decoders, despite requiring a lowercomplexity at moderate to high signal-to-noise ratios (SNRs).Additionally, compared with the non-iterative hard-output SCSdecoder, our SSCS scheme attained 1.5 dB SNR gain at a biterror ratio level of 10^-5, when decoding the [256; 512] polar codeof a (64 * 64) MIMO system.

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Accepted/In Press date: 3 May 2021

Identifiers

Local EPrints ID: 448980
URI: http://eprints.soton.ac.uk/id/eprint/448980
ISSN: 0018-9545
PURE UUID: 7a9d255e-e564-49d0-90cf-e039e58ac47a
ORCID for Luping Xiang: ORCID iD orcid.org/0000-0003-1465-6708
ORCID for Robert Maunder: ORCID iD orcid.org/0000-0002-7944-2615
ORCID for Lie-Liang Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 12 May 2021 16:35
Last modified: 13 May 2021 02:03

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Contributors

Author: Luping Xiang ORCID iD
Author: Yusha Liu
Author: Robert Maunder ORCID iD
Author: Lie-Liang Yang ORCID iD
Author: Lajos Hanzo ORCID iD

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